A Sub-Clause 20.2.1 Notice issued on hour 47 of a 48-hour window.
Recovering roughly 85% of a low seven-figure claim that sat 48 hours from time-bar.
Illustrative scenario — a composite worked example built to show how the contract mechanics operate, not an account of a single identifiable client engagement. Figures are representative.
Situation
A Tier-1 civils contractor on a mid eight-figure (USD) Gulf rail civils package, under a heavily amended FIDIC Yellow Book 2017. The Particular Conditions had shortened the 28-day notice window at Sub-Clause 20.2.1 to 14 days and deleted Sub-Clause 20.2.5 (the limited relief mechanism for late notification) entirely. The Engineer issued a written instruction on day 1 of the month directing a substantive change to deep-foundation geometry, framed as a 'design clarification' rather than as a variation under Sub-Clause 13.
Complication
The project commercial team treated the letter as exactly that, a clarification, and routed it to the engineering team for response. By the time the structural engineer pushed back internally and flagged that this was substantively a variation, day 12 had passed. With a 14-day window, the contractor had 48 hours to issue a compliant Notice or lose entitlement entirely. The estimated value at stake was in the low seven figures (USD).
Approach
A specialist commercial lead is focused on the notice drafting from day 13. The Notice is issued at 14:00 on day 14, two hours before the deadline. It is issued under Sub-Clause 20.2.1, citing both 13.3 (Variation by instruction regardless of form) and 8.5 (EoT). The awareness date is argued as day 12 (the date the engineering team formally identified the substantive change), not day 1. The reservation of rights is specific to the Variation characterisation. A Fully Detailed Claim is committed for day 84.
Outcome
The Engineer's initial response under 20.2.2 challenges the awareness date and the Variation characterisation. The Fully Detailed Claim at day 84 sets out the cause-effect chain in detail. After two rounds of correspondence and a 3.7 determination, a settlement in the region of 85% of the claimed value is a realistic result. None of it would have been available had the Notice been even a day late: where the Particular Conditions delete the limited relief at Sub-Clause 20.2.5, a missed window is an absolute bar to entitlement.
Lessons
Internal handoff between engineering and commercial is the most reliable source of missed notices. A standing rule that any Engineer's instruction, however labelled, is logged for awareness-date purposes on the day it arrives, eliminates the failure mode.
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